Sourceforge

Sourceforge.net is owned and operated by Geeknet, Inc.—a publicly traded Us-based company. It has a dedicated section where one can find nearly all Open Source software that are available for engineers. The listing has information about each software, links to download and the home page of the software project. It is one of the richest collections of free and Open Source software.

http://sourceforge.net/directory/science-engineering/os:linux/freshness:recently-updated/